Ground anchor



Feb. 28, '19.33. D. NETTENSTROM 1,899,520

GROUND ANCHOR Filed Aug. 19. 1929 Patented Feb. `28, 1933 Y f i 1 v1,899,520*

Y v QWANNER, OILYCHICAGO,A ILLINOIS f 'GaoUiRm ANCHOR Application ledAuguSt 19, 1929; Serial No. 386,850.

' t This invention relates to Aground anchors j for connectiontotension members 'such as guy ropes or cables, andthe like, and has for an object to produce an anchoring device-ofimproved and simplified construction which consists in certain features and'elements Iof construction herein shown and described, yas

indicated by theclaims.l .l c

Inthedrawing: --r j Figure 1 is top Vplan view of an anchoring device embodying the .presenty invention,

shown with'the retaining flangescollapsed and inserted in a hole in the ground, "and indicating diagrammaticallyfthe 'position that two ofthe retaining flanges may -be caused toassumefwhen the device has been actuated. Y z A Figure 2 is a vertical` cross section ofthe devicel in' collapsed position takenl substan tially as indicatedat line'2-2 on Figure 1".

Figures 3 and 4 are fragmentary trans-` verse sectional views of the,inter-engaging` driving connections of the respective retain-' ing flanges taken substantially as indicated at lines 3-8 and 4:-4respectively. Figure 5 is a top plan view of theanchor-j ing device showing a preferred arrangement of the r-etaining flanges in operative position;

The anchoring device embodying the present invention includes an anchoring rod, 10, 40

provided adjacent its lower end with collaps ible retaining means comprising threeaxially spaced laterally projecting flanges, l1, 12 and 13 sometimes hereinafter called blades. The upper flange,'11, which may he termed the driver, is rigidly secured to the anchor rod by means of a key, 14, while the two lower flanges are free to rotate onsaid rod and are retained in positioned thereon by a washer, 15, held in place by the riveted or peened-over lower end of the anchor rod.Y

PATENT.

DAVID NETTNSTROH, 0F CHICAGO,'-ILLrivo1s,:Ass1GNon .or ONE-HALF To HAnnYc.

These retaining flanges are each dimensioned y to substantially occupyY the cross sectional area of the hole, and are designed for enV gagement with the anchor rod at an eccentric' point adjacent their outer 'periphery so that, when the two lower retaining 'flanges a'rejro-v tated'about the rod for registrationv invertical alignment with the upper flange, 11,in" i collapsed position, theV device maybe -insert' ed 1n thev hole, as indicated at 18, with the rod eccentrically disposed' therein and,l ad'- jacent the'fside wall of the hole." The anchoring rod is dimension so tliat'its upper end extend-s asubstantial distance above the surface-ofthe ground and is formed with' an eye, for connection with a tensionV memher such as-a guy rope or a cable. i n The retaining flanges aref'providedwith lost motion inter-engaging vdriving connec-v tions by'means of which motion is imparted from one to the next adj acentA flange of they ser1es,` commencing with the driver, 11`. These driving connections include` a downwardlyl projecting boss vor stop, 11a, on--the i, f F5 under side of the `upper flange, 11, positioned to co-operate with an upwardlyprojecting boss,`12a, on fthe vupper side ofthe intermediate flange, 12,"V and said intermediate flange is also provided with a down? wardly projecting boss, 12b, directly op# posite ythe boss, 12a, landadapted tofregey isterV for jco-operative lengage/ment l'with anv upwardly projectingboss, 13a, ofthe bottom retaining flange, 13.' Thesestop bosses are of sectoral arcuate formation and since there are hut three flanges'in the series, the 'bosses are of KOv vangularextent, and it willbe understood that for a different number of re@ taining flanges, the angularzextent of these bosses willjbe varied 'proportionally to 4.thenumber of flanges in the series; h owever.`it has been found that three flanges servev the purpose satisfactorily; It :will hel apparentk that wheny the driverof upper flange, 11,1is f afcomplete revolution beforel boss,'11a,-eni` counters boss, 12, for imparting motion tov the intermediate flange, 12, in which position the upper flange is angularly spaced by onethird rotation, or 180, with respect to the yother flanges, 12 and 13. And, likewise, when the driver or upper flange is rotated another third revolution,the intermediate flange by means lof bosses, 11, 12, is rotated there? with, the lower flange remaining in its original or initial position because ofthe lost motion driving" connection between bosses, 12a, and 13a; in this position the bosses,'12?, and 13, are abutting, so that upon continued rotation, motion would be. imparted tothe lower flange, 13. However, after two thirds rotation of the driver or upper flange, the threejflanges are equallyangularly spaced, forming together a retaining flange having an area several times the cross sectional area of the hole.

Any suitable cross rod, wrench or tool may be applied to the upper end of the anchor rod for imparting rotary motion to the driver or upper flange, 11, by Vmeans of A which the flanges, commencing lwith said driver orupper retaining flange, are swunglaterally and caused to operate as blades and cuttheir lway into'the solid ground adjacent the hole, 18, in angularly spaced relation.

Thus in the arrangement illustrated in Figure 1, two of the flanges are almost to- .tally disposed beneath solid ground, giving a relatively firm anchorage.` And of course,

the loose earth is again replaced and tamped in the hole on top of the flange inv registraf tion withfthe hole .to provide anchorage,

therefor. But lpreferably the device is rotated slightly less or slightly more than one ,complete revolution, (to be more definite, approximately one-sixth of a revolution) so that the retaining flanges will be causedV tol ,assume a position substantially as illustrated in Figure 5,V wherein eachof the retaining flanges is at leastpartially embedded under solid earth for firmly anchoring the device therein. Y j f My improved anchoring device is relatively simple, having but few parts, and is' capable of quick and easy installation or removal. As may be noted in the drawings, the particular arrangement and design of the retaining flanges is such that lboth the upper .and lower flanges, 11 and 13, are identical, and are employ-ed in reverse arrangement, thus reducing pattern costs and especially the costs of maintaining ords, storage, etc. j

Although I have shown and described one embodiment of my invention, it will be understood that the construction and arrangement of parts ,may vary without departing from the spirit and s cope of my invention. I do not therefore Wish to be construed yas limiting myself to the specic construction illustrated herein, excepting as separate rec- Y members and .the other members mounted-to i rotate .on-.the rod, said flange members having sectorally extending bosses projecting from their adjacent faces, the angular extent of `said sectoral bosses aggregating 36() degrees,'and"in the collapsed position of the flange members occupying circumferentially successive positions about the axis of the rod,

and extending axially past each other for mutual engagement to A.transmit rotative movement successively4 from the memberl which is fixed to the rod. v v

- 2. A ground anchoring device in accordance ,with claim l, in which each of the said bosses extends angularly abouti-the axis of the rod by the amount by which each of the llangemembers is displaced angularly with respeetto the adjacent flange member in the fully expanded position of the anchor.

8. In a ground anchor-as defined in claim l, said flange members being three in number and each of the segmental bosses extending angularly with respect to the axis of the rod by substantially 4L. V A ground. anchoring device comprising an anchor rod having a transversely extending portion at the upper end and'retaining means atthe lower end consisting of aiplurality of superimposed flange members similar in outline and eccentrically mounted on the rod, saidflangemembers having sector-1 DAVID NErTENsTRoM. 

